1 | import type {
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2 | EntityState,
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3 | IdSelector,
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4 | Comparer,
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5 | EntityStateAdapter,
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6 | Update,
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7 | EntityId,
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8 | } from './models'
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9 | import { createStateOperator } from './state_adapter'
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10 | import { createUnsortedStateAdapter } from './unsorted_state_adapter'
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11 | import {
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12 | selectIdValue,
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13 | ensureEntitiesArray,
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14 | splitAddedUpdatedEntities,
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15 | } from './utils'
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16 |
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17 | export function createSortedStateAdapter<T>(
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18 | selectId: IdSelector<T>,
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19 | sort: Comparer<T>
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20 | ): EntityStateAdapter<T> {
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21 | type R = EntityState<T>
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22 |
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23 | const { removeOne, removeMany, removeAll } =
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24 | createUnsortedStateAdapter(selectId)
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25 |
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26 | function addOneMutably(entity: T, state: R): void {
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27 | return addManyMutably([entity], state)
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28 | }
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29 |
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30 | function addManyMutably(
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31 | newEntities: readonly T[] | Record<EntityId, T>,
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32 | state: R
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33 | ): void {
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34 | newEntities = ensureEntitiesArray(newEntities)
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35 |
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36 | const models = newEntities.filter(
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37 | (model) => !(selectIdValue(model, selectId) in state.entities)
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38 | )
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39 |
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40 | if (models.length !== 0) {
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41 | merge(models, state)
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42 | }
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43 | }
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44 |
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45 | function setOneMutably(entity: T, state: R): void {
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46 | return setManyMutably([entity], state)
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47 | }
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48 |
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49 | function setManyMutably(
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50 | newEntities: readonly T[] | Record<EntityId, T>,
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51 | state: R
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52 | ): void {
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53 | newEntities = ensureEntitiesArray(newEntities)
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54 | if (newEntities.length !== 0) {
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55 | merge(newEntities, state)
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56 | }
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57 | }
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58 |
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59 | function setAllMutably(
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60 | newEntities: readonly T[] | Record<EntityId, T>,
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61 | state: R
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62 | ): void {
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63 | newEntities = ensureEntitiesArray(newEntities)
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64 | state.entities = {}
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65 | state.ids = []
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66 |
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67 | addManyMutably(newEntities, state)
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68 | }
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69 |
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70 | function updateOneMutably(update: Update<T>, state: R): void {
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71 | return updateManyMutably([update], state)
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72 | }
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73 |
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74 |
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75 | function takeUpdatedModel(models: T[], update: Update<T>, state: R): boolean {
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76 | if (!(update.id in state.entities)) {
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77 | return false
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78 | }
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79 |
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80 | const original = state.entities[update.id]
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81 | const updated = Object.assign({}, original, update.changes)
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82 | const newKey = selectIdValue(updated, selectId)
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83 |
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84 | delete state.entities[update.id]
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85 |
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86 | models.push(updated)
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87 |
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88 | return newKey !== update.id
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89 | }
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90 |
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91 | function updateManyMutably(
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92 | updates: ReadonlyArray<Update<T>>,
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93 | state: R
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94 | ): void {
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95 | const models: T[] = []
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96 |
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97 | updates.forEach((update) => takeUpdatedModel(models, update, state))
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98 |
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99 | if (models.length !== 0) {
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100 | merge(models, state)
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101 | }
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102 | }
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103 |
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104 | function upsertOneMutably(entity: T, state: R): void {
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105 | return upsertManyMutably([entity], state)
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106 | }
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107 |
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108 | function upsertManyMutably(
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109 | newEntities: readonly T[] | Record<EntityId, T>,
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110 | state: R
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111 | ): void {
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112 | const [added, updated] = splitAddedUpdatedEntities<T>(
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113 | newEntities,
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114 | selectId,
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115 | state
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116 | )
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117 |
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118 | updateManyMutably(updated, state)
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119 | addManyMutably(added, state)
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120 | }
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121 |
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122 | function areArraysEqual(a: readonly unknown[], b: readonly unknown[]) {
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123 | if (a.length !== b.length) {
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124 | return false
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125 | }
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126 |
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127 | for (let i = 0; i < a.length && i < b.length; i++) {
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128 | if (a[i] === b[i]) {
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129 | continue
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130 | }
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131 | return false
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132 | }
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133 | return true
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134 | }
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135 |
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136 | function merge(models: readonly T[], state: R): void {
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137 |
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138 | models.forEach((model) => {
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139 | state.entities[selectId(model)] = model
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140 | })
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141 |
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142 | const allEntities = Object.values(state.entities) as T[]
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143 | allEntities.sort(sort)
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144 |
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145 | const newSortedIds = allEntities.map(selectId)
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146 | const { ids } = state
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147 |
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148 | if (!areArraysEqual(ids, newSortedIds)) {
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149 | state.ids = newSortedIds
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150 | }
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151 | }
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152 |
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153 | return {
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154 | removeOne,
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155 | removeMany,
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156 | removeAll,
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157 | addOne: createStateOperator(addOneMutably),
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158 | updateOne: createStateOperator(updateOneMutably),
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159 | upsertOne: createStateOperator(upsertOneMutably),
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160 | setOne: createStateOperator(setOneMutably),
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161 | setMany: createStateOperator(setManyMutably),
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162 | setAll: createStateOperator(setAllMutably),
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163 | addMany: createStateOperator(addManyMutably),
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164 | updateMany: createStateOperator(updateManyMutably),
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165 | upsertMany: createStateOperator(upsertManyMutably),
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166 | }
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167 | }
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